Dorfer



@No Model.)

J. HOFFMAN.

LEAD AND GDAYON HOLDER Patented Deo. 6,1881?.

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NTTen STATES PATENT Ormea.

JOSEPH HOFFMAN, OF NEW YORK, N. Y., ASSIGNOR TO JOSEPH REOKEN- DORFER, OF SAME PLACE. y

LEAD AND CRAYON HOLDER.

SPECIFICATION forming part of Letters Patent No. 250,537, dated December 6, 1881.

Application tiled October 11, 1881. (No model.)

To all whom it may concern.

Be it known that I, JosEPH HOFFMAN, of-

the city, county, and State ot' New York, have invented certain new and useful Improvements in Lead and Crayon Holders, of which the following is a specification.

My invention relates to that kind of lead and crayon holder known as the automatic-' a holder in which the lead clamp or grasping Io device is brought to a position in which it takes hold of the lead by a spring and is actuated againstthe stress of the spring by a longitudinally-movable pressurecap to release the lead.

The holder in which my improvement is comprised consists of a sheath, in whose tip is formed one or more holes, intended to permit the entrance therein at proper times of one or more knots or projections on the expanding zo lead grasping or clamping jaw or jaws carried by the lead-tube. The latter placed within the handle has a rotary movementponly, and has a projecting guide-pin, which enters botha circular guide-slotn the handle and also an in- 2 5 clined slot in a pressure-cap arranged to move longitudinallyT in the handle. Within the cap is a spring, which forces the cap back in the direction to rotate thelead-tube far enough to bring the protuberances on the lead-clamping 3o jaws out of register with the holes inthe sheath tip or nozzle, and the cap can by hand be pressed forward against the stress of the sprin g to cause the lead-tube to rotate far enough to bring the protuberances on the clamping-jaws in reg- 3 5 ister with the holes in the sheath-tip, thus permitting the jaws to expand and release the lead. When hand-pressure on the cap is removed the retracting-spring returns the parts to a position in which the lead-clamp closes. 4o In the accompanying drawings, Figure l is a side elevation, partly. in section, of a holder embodying my invention, the tip section being on line l l, Fig. 5. Fig. 2 is a longitudinal section of the tip and the lead-tube, with the jaws in register with openings in the tip, the section being on line 2 2, Fig. 6. Fig. 3 is a side elevation of the rear end of the sheath. Fig. 4 is a like elevation of the pressure-cap. Fig. 5 is cross-section'on enlarged scale on line 5o 5 5, Fig. 1. Fig. 6 is a section on enlarged scale on line 6 6, Fig. 2. Fig.7 is a section on enlarged scale on line 7 7, Fig. 1.

A is the tubular sheath or handle, provided with a tip or nozzle. a, as usual. B is the leadcontaining tube, suitably supported within the sheath, and connected therewith by a pin, b, which projects from it into acircular slot, c, in a ferrule xed on the rear end of the sheath, this pin-and-slot connection permitting the tube a movement of partial rotation, but pre- 6o venting itfrom moving longitudinally with respect to the sheath.4 The front end ofthe leadtube carries one or more c1a1nping-jawsin this instance two spring-jaws, d, which extend to within a short distance of the Jfront end of the sheath tip or-nozzle a, and normally stand y apart. Upon the outer face of each jaw is formed a small knob or protuberance, e, and in the tip are formed holesf, at such distance apart as to 'register with the knobs e. When 7o the tube B is rotated far enough in one direction. the knobs e will be brought opposite the holesf, andthey consequently, by the expansive action ot" the jaws, will rise and enter therein, and so permit the jaws to release the lead, as indieatedpin Figs. 2, 6. When,on the other hand, the tube is rotated far enough to throwT the knobs c out of register with holesf, the knobs will be carried under and pressed by the imperforate portions ot' the tip, and the 8o jaws consequently' will be pressed together upon the lead, as indicated in Figs. 1, 5. 'llo provide for obtaining these movements of the lead-tube, lmountupon the sheathA a pressurecap, C, connected with the sheath by a pin and longitudinal slotconnection, gh, which permits the ca-p to move back and forth lengthwise ot' the sheath. In the cap is also formed a spiral or inclined slot, fi, which is entered by the pin b of the lead-tube. The slot t' is so placed that 9o when the cap is moved forward it will rotate the lead-tube in a direction to carry the knobs e into register with holcsj', and so release the lead, and when moved back it will rotate the tube in the opposite direction, thus carrying the knobs c out of register with holes f, and consequently closing the lead-clampingdevice. The rearward movement of the cap is effected automatically by theretracting-spring j, conined between the end of the sheathand the roo heed ofthe pressure-cap, and the forward movementof the Cep is effected by hand against the stress of the retractng-spring.

The holder thus made is simple, effective, and automatic in action.

What I claim, and desire to secure by Letters Patent, is- L .A lead and crayon holder composed of the tubular sheath, longitudinally-movable pressure-cap, and retracting-spring, in combination with the rotary lead-tube, united by pin-and-slot connection with the sheath and pressure-cap, substantially as described, the lead-clamping jaws carried by the tube, and provided with knobsor protuberances e, and the sheath tip or 15 nozzle provided with holes f, with which the protuberances e are thrown into and out of regi-ster, in the manner and for the purposes set forth.

In testimonyv whereot` I have hereunto set zo my hand.

JOSEPH HOFFMAN. 

